People with lactose intolerance do not have enough a. lactose b. lactase c. glucose d. fructose

b. Not enough lactase!

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

b is dominant over the allele for the white fur.